Rockwell Automation 1771-QDC, D17716.5.86(Passport) PLASTIC MOLDING MODULE - Manual (Page 149)

Load Initial Profile Values
Chapter 8
8-28
EndĆofĆSegment Position Setpoints
(PPC11, 15, 19, 23, 27, 31, 35, 39, 43, and 47)
Use these words to configure the backpressure vs. position profile. The
procedures in chapter 9 require that you use all 10 position setpoints.
Determine end-of-segment position setpoints for your backpressure vs.
position profile for use in chapter 9 as follows:
1. Back up the ram (screw) from the mold end to the shot size position
as read in SYS25 (N40:177). Refer to PPC62 for this value.
2. Divide this length by 11, the maximum number of segments for this
profile. The dividing line for each segment is a multiple of this
division.
For example, if the ram travel distance in step 1 was 11”, the
11-segment profile has dividing lines at 1” intervals. That is,
end-of-segment positions of 1”, 2”, 3”, ... 9” and 10”.
Important: Measure end-of-segment positions from the mold end.
Mold End
PPC11
PPC15
PPC19
Direction of Ram (Screw) Travel
PPC47
Seg 1 Seg 2 Seg 3 Seg 4 Seg 10 Seg 11
3. Enter your end-of-segment position setpoints on Worksheet 8-D.
The valve spanning procedures in chapter 9 require these initial values. For
additional information, refer to the Plastic Molding Module Reference
Manual (publication 1771-6.5.88).
Time Setpoints
(PPC12, 16, 20, 24, 28, 32, 36, 40, 44, and 48)
Use these words when configuring backpressure vs time profiles. You
enter time in seconds. Each setpoint controls the time of its corresponding
segment. You must use one less time setpoint than pressure setpoints.
We entered zero for all 10 time setpoints on Worksheet 8-D.
Profile Offset
(PPC52)
The profile offset lets you shift the amplitude of the backpressure profile
up or down, if necessary. You enter this setpoint in PSI or Bar.
We entered zero (no offset) on Worksheet 8-D.